Harry Potter The Serpent King

AU. Harry Potter wasn't the Gryffindor golden-boy. Harry was the star student of Slytherin House, best friends with Draco Malfoy and Daphne Greengrass. After the death of his godfather, Harry snaps killing the man responsible and then murders his muggles relatives before making the choice to join the Death Eaters. Evil Harry. Powerful Harry. Deranged Harry.